LG 5924Performance Level (PL) d and Category 3 according to EN ISO 13849-1, SIL claim limit (SIL CL) 2 according to IEC/EN 62061, Safety Integrity Level (SIL) 2 according to IEC/EN 61508, Category 3 according to EN 954-1, 1-channel circuit, LED displays for channel 1 / 2 and operating status, width 22.5 mm